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config_labels.go
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config_labels.go
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package cmd
import (
"context"
"fmt"
"os"
"github.com/AlecAivazis/survey/v2"
"github.com/AlecAivazis/survey/v2/terminal"
"github.com/spf13/cobra"
fn "knative.dev/kn-plugin-func"
"knative.dev/kn-plugin-func/utils"
)
func init() {
configCmd.AddCommand(configLabelsCmd)
configLabelsCmd.Flags().StringP("path", "p", cwd(), "Path to the project directory (Env: $FUNC_PATH)")
configLabelsCmd.AddCommand(configLabelsAddCmd)
configLabelsAddCmd.Flags().StringP("path", "p", cwd(), "Path to the project directory (Env: $FUNC_PATH)")
configLabelsCmd.AddCommand(configLabelsRemoveCmd)
configLabelsRemoveCmd.Flags().StringP("path", "p", cwd(), "Path to the project directory (Env: $FUNC_PATH)")
}
var configLabelsCmd = &cobra.Command{
Use: "labels",
Short: "List and manage configured labels for a function",
Long: `List and manage configured labels for a function
Prints configured labels for a function project present in
the current directory or from the directory specified with --path.
`,
SuggestFor: []string{"albels", "abels", "label"},
PreRunE: bindEnv("path"),
RunE: func(cmd *cobra.Command, args []string) (err error) {
function, err := initConfigCommand(args)
if err != nil {
return
}
listLabels(function)
return
},
}
var configLabelsAddCmd = &cobra.Command{
Use: "add",
Short: "Add labels to the function configuration",
Long: `Add labels to the function configuration
Interactive prompt to add labels to the function project in the current
directory or from the directory specified with --path.
The label can be set directly from a value or from an environment variable on
the local machine.
`,
SuggestFor: []string{"ad", "create", "insert", "append"},
PreRunE: bindEnv("path"),
RunE: func(cmd *cobra.Command, args []string) (err error) {
function, err := initConfigCommand(args)
if err != nil {
return
}
return runAddLabelsPrompt(cmd.Context(), function)
},
}
var configLabelsRemoveCmd = &cobra.Command{
Use: "remove",
Short: "Remove labels from the function configuration",
Long: `Remove labels from the function configuration
Interactive prompt to remove labels from the function project in the current
directory or from the directory specified with --path.
`,
SuggestFor: []string{"del", "delete", "rmeove"},
PreRunE: bindEnv("path"),
RunE: func(cmd *cobra.Command, args []string) (err error) {
function, err := initConfigCommand(args)
if err != nil {
return
}
return runRemoveLabelsPrompt(function)
},
}
func listLabels(f fn.Function) {
if len(f.Labels) == 0 {
fmt.Println("There aren't any configured labels")
return
}
fmt.Println("Configured labels:")
for _, e := range f.Labels {
fmt.Println(" - ", e.String())
}
}
func runAddLabelsPrompt(ctx context.Context, f fn.Function) (err error) {
insertToIndex := 0
// SECTION - if there are some labels already set, choose the position of the new entry
if len(f.Labels) > 0 {
options := []string{}
for _, e := range f.Labels {
options = append(options, fmt.Sprintf("Insert before: %s", e.String()))
}
options = append(options, "Insert here.")
selectedLabel := ""
prompt := &survey.Select{
Message: "Where do you want to add the label?",
Options: options,
Default: options[len(options)-1],
}
err = survey.AskOne(prompt, &selectedLabel)
if err != nil {
if err == terminal.InterruptErr {
return nil
}
return
}
for i, option := range options {
if option == selectedLabel {
insertToIndex = i
break
}
}
}
// SECTION - select the type of label to be added
selectedOption := ""
const (
optionLabelValue = "Label with a specified value"
optionLabelLocal = "Value from a local environment variable"
)
options := []string{optionLabelValue, optionLabelLocal}
err = survey.AskOne(&survey.Select{
Message: "What type of label do you want to add?",
Options: options,
}, &selectedOption)
if err != nil {
if err == terminal.InterruptErr {
return nil
}
return
}
newPair := fn.Pair{}
switch selectedOption {
// SECTION - add new label with the specified value
case optionLabelValue:
qs := []*survey.Question{
{
Name: "name",
Prompt: &survey.Input{Message: "Please specify the label name:"},
Validate: func(val interface{}) error {
return utils.ValidateLabelName(val.(string))
},
},
{
Name: "value",
Prompt: &survey.Input{Message: "Please specify the label value:"},
Validate: func(val interface{}) error {
return utils.ValidateLabelValue(val.(string))
}},
}
answers := struct {
Name string
Value string
}{}
err = survey.Ask(qs, &answers)
if err != nil {
if err == terminal.InterruptErr {
return nil
}
return
}
newPair.Name = &answers.Name
newPair.Value = &answers.Value
// SECTION - add new label with value from a local environment variable
case optionLabelLocal:
qs := []*survey.Question{
{
Name: "name",
Prompt: &survey.Input{Message: "Please specify the label name:"},
Validate: func(val interface{}) error {
return utils.ValidateLabelName(val.(string))
},
},
{
Name: "value",
Prompt: &survey.Input{Message: "Please specify the local environment variable:"},
Validate: func(val interface{}) error {
return utils.ValidateLabelValue(val.(string))
},
},
}
answers := struct {
Name string
Value string
}{}
err = survey.Ask(qs, &answers)
if err != nil {
if err == terminal.InterruptErr {
return nil
}
return
}
if _, ok := os.LookupEnv(answers.Value); !ok {
fmt.Printf("Warning: specified local environment variable %q is not set\n", answers.Value)
}
value := fmt.Sprintf("{{ env:%s }}", answers.Value)
newPair.Name = &answers.Name
newPair.Value = &value
}
// we have all necessary information -> let's insert the label to the selected position in the list
if insertToIndex == len(f.Labels) {
f.Labels = append(f.Labels, newPair)
} else {
f.Labels = append(f.Labels[:insertToIndex+1], f.Labels[insertToIndex:]...)
f.Labels[insertToIndex] = newPair
}
err = f.WriteConfig()
if err == nil {
fmt.Println("Label entry was added to the function configuration")
}
return
}
func runRemoveLabelsPrompt(f fn.Function) (err error) {
if len(f.Labels) == 0 {
fmt.Println("There aren't any configured labels")
return
}
options := []string{}
for _, e := range f.Labels {
options = append(options, e.String())
}
selectedLabel := ""
prompt := &survey.Select{
Message: "Which labels do you want to remove?",
Options: options,
}
err = survey.AskOne(prompt, &selectedLabel)
if err != nil {
if err == terminal.InterruptErr {
return nil
}
return
}
var newLabels fn.Pairs
removed := false
for i, e := range f.Labels {
if e.String() == selectedLabel {
newLabels = append(f.Labels[:i], f.Labels[i+1:]...)
removed = true
break
}
}
if removed {
f.Labels = newLabels
err = f.WriteConfig()
if err == nil {
fmt.Println("Label was removed from the function configuration")
}
}
return
}